Rotor disk for brakes



y 1945- w. M. LIPPS ROTOR DISK FOR BRAKES I Filed Dec. 13, 1945 I 2 Sheets-Sheet 1 v//////////g ===i v,

' INVENTOR 6/! z lPPS ATTORNEY May s, 1945, w. M, 'UF Ps 2,375,566

ROTOR DISK FOR BRAKES Filed Dec. '13, 1945 2 Sheets-Sheet 2 INVENTOR e /Z 4 IPP5 ATTQIgIyEY Patented May 8, 1945 ROTOR DISK FOR BRAKES r WalterM. Lipps, Birmingham, Michgassignor to American Chain 8.: Cable Company,

Inc.,

Bridgeport, ConnL, a corporation of NevvYork f Application December 13, 1943, Serial No. 514,131 6 claims. (o1. ice-+218) This invention relates to'improvementsin rotor disks for brakes, more particularly rotor disks of the ventilated type. i 1 In stopping a truck within the legal stopping distance, the rotor disk, more particularly the annularfacing plates of the rotor disk, may be heated from out-door temperature to approximately 1300 F. in six seconds. This causes considerable radial expansion of the. annular facing platesof therotordisk, and when cooling, causes contraction. This radial expansion of theannui lar facing plates may cause them to Warp or proved rotor disk with parts broken away buckle in constructions in which their outer sec tions are rigidly and immovably secured to a sup.-

porting spider or the like. l l i The main object of this invention is an improvement in rotor disks to prevent warping or bucklingof their annular facing plates. 7 More specifically, an object of this invention is an improved rotor disk including a supporting spider and annularfacing plates secured against i the side faces of the legs of the spider, in which the annular facing ,plates are secured at points' near their inner and outer edges againstthe side faces of the legs of the spider andin which provision is made. to permit the outer sections of the annular facing plates tomove radially out- Fig. 3 1s a transverse section on line 3-3 of Fig-2}" Fig.4 is a side View of another formof my imthe outer rivet connection; and.

Fig. 5 is a transverse section on line 5-5.of

Fig. 4. i

For purposes of disclosure I have illustrated in Fig. l a brake mechanism on an automobile or truck, but it is to be understood that the brake l 1 mechanism including my improved rotor disk may be used on any other vehicle or on a shaft of a machine or the like. r 1 i In Figs. 1, 2 and 3 there is shown a brake mechanism which includes one of my improved I forms of rotor discs designated by the letter A.

Shown cooperating with the outer faces of the annular facing plates of the rotor disc are brake shoes which may be operated byany suitable mechanism indicated generally by the letter B,

the constructiondisclosed being that shown in the patent to Williams 1,978,974, dated October wardly with respect to the legs of the spider upon radial expansion due to heat developed by a braking operation. i

More specifically, an object of this invention is to provide floating rivets or the like for securing the outer sections of the annular facing plates against the side faces of the legs of the spider so as to permit radial outward expansion of the annular facing plates with respectto the legsof the spiderand prevent distortion of the annular facing plates when they are suddenly heated by braking action to high temperature which inthe operation of braking is usually considerably higher than thatof the; legs of the spider. V r

Another object of this invention is to provide a construction in which the outer row of rivets maybe located very close to the outeredges of the annular facing plates.

Other objects of this invention will appear from the following description taken in connection with the drawings, in which:

Fig. 1 is a side view of a brake including my improved rotor disk, this figure also showing brake shoes and their operating means;

Fig. 2 is a side view of one form of my improved rotor disk with parts broken away to show the outer rivet connection;

30, 1934. r r i The rotor disc A is of a composite construction of the ventilated type disclosed in the patentto Williams et al. 1,995,135, dated March 19, 1935, and includes a spider 6 (Figs. 2 and 3) which consists of an inner annular member provided with rivet or bolt holes by means of which the spider maybe secured to a rotatable shaftsuch as an engine or transmission shaft not disclosed. The spider is provided with a series of circumferentially spaced radially and outwardly extending legs 1 against the side faces of which are secured annular facing plates 8 and (1 which i are of identical construction and with which the brake shoes cooperate to produce the braking action. The spider and theannular facing plates may be made of 'malleable iron. As disclosed, the faces on the outer ends of the legs of the spider are alined transversely with the faces on the outer edges of the jannular facing plates 8 and 9. M

In the construction disclosed in Figs. 1, 2 and 3 the annular facing plates 8 and 9 are secured near their inner edges against the side faces of thelegs 1 of the spider B by a circular series of rivets lll extending through the annular facing plates and the legs I of the spider. near their inner ends landfitting tightly in the rivet holes in the annular facing plates and legs of the spider. In constructions of this generalfltype it is desirable, of course, to secure the outer sections of the annular facing plates against the side faces of the legs of the spider to obtain to show .indicated at [2, made considerably larger-.thana the rivets in order that I may employ spacing bushings l3 through which thetrivets l' 'l' extend, which bushings are providedto:suppor-tttlierivets and prevent them from bending during the riveting operation. In this constructionicleariancesis. providedbetween the bushings l3 and the walls. of the holes l2 so that the bushings marmove' outwardly. with: the: outer sections of the? annular facing plates during expansion due to heatgdea veloped' duringqthebraking action; g

. In. the second; form. of. the". invention disclosed:

spider 6. the legs. of; which: are: indicated! at; 1'. The annular facing plates are indicated at Bf'and 9 These plates are: ofthe same constnucticn as; those; diSCIOSGd-iII'l' YlgSa 1 2v anda3: exceptthat.

the outer circular. series of rivet .holes is located closer to the: outer edges ofv the annular; facingplates. andi'includesadditional: rivet. holes for purposes to be described.

In-this embodiment. the outer-endszof; the legs 1! of. the spider 6,- arerecessed: as? indicated. at.

l2! for the. reception of. the. spacing;- bushingsr l3 and: rivets I1. 'Ilhismakesit possible; ta locate thexbushings t3 and; rivets. I=L much; closer to, the:

outer edges of theannula-r.facing platestf and. 9! than. in the construction disclosedi inEigst. 13 2; and 3,,which,.cf course,-.is,desirablej inia.fabricatedconstruction. of this character..

-As disclosed in Fig. 4, I also may providebushings [sand-rivets I1I- intermediate ofthelegs' I of. the spider 6! to support the annulan facing.- plates 8! and 9. at these points; so as to prevent. thexsamefrom distorting and bucklinggina the. regionsbetween-the -legs;o.f thespi'der.

While: I have: disclosed two embodiments. of

myinvention which I, now; regard as preferred forms, it: is to be: understood that this-.hasbeen.

donemerely for the purpese'of' disclosing. the;

invention: and that. I .reser ve the-right. to -a1l such changes as fallwithin. the principles-of; thisiinevention and the scopeof the accompanying. claims; 7 g 1 r I1 claim? 7 i l; A- roton brakedisle. comprising a supporting member; and; an, annular,facing, plate located against one side of said. supporting-memben. aseries: oi securing, means: securing. said. facing v platev near its. innerv edge against. the. side. faceof said supporting member, and an outer serieslof' securing means also-securingsaid platenear its outer. edge against. the. side. faceofi said. support ing member. and. providing. for relativeradial. movement between the: outer. edge. of? the facing; plate and. thesupporti'ng. member...

2. 'A rotor brake. disk comprising. a. supporting, spider providedl with. a. plurality of. radially out.- wardly extending. leg s,.. a. pair. of armulitr. facing.

plates in contact with the outside faces of said legs, an inner series of rivets connecting said plates near their inner edges against the side faces of the legs of the spider, and an outer series of rivets connecting said annular plates near their outer edges against the side faces of the legs of the. spider, all of said rivets of both of saidzseriespassing through holes in the plates and in" the legs of" said spider and the holes in thelegs of the spider through which the rivets of the outer series pass being of greater dimension radially th'an the rivets.

3. A rotor brake. disk comprising a spider provided with a plurality of radially outwardly extending legs, a. pair of annular facing plates secured againstfltlie side faces of the legs of the spider-r by. securing:v means comprising an inner legs an'dan outer series of rivets passing through in Figs. 4 and 5,,theroton-diskzA-f includesiat seriesof rivets passing through said plates and saidiplatesandslegsg. andspacihg bushingszcnthe rivets ofthe outer series located; in: openingsiin; the legs of the spider of greater diametersithan;

theidiamet'ersr-of the-bushings;

4. In, ai rotor. brake: diskg. the xcombinationzioff a supporting; spider provided:- with? radiallyoutiwardly; extending. legs: the outen ends: of which:

are provided with recesseswipening radially'oute weirdly,- a1 pair-of annular facing plateszlucateda against the: sides; of said legs; means. rigidly. seicuring; the inner; regions of said-plates; to" said legs and: a series of! rivets: connecting the outer regions of said platesv and holding; them against. the. side faceszoffsaidilegs, .saidirivetsibeingzfreely' received within the recesses in; the' ends: ofr said:

legs; r

5. In. arotor brake dis-1m. the combinationrof' a supporting; spider. provided: with: radially outwardly extending; legs the;outer: ends of which are provided: with recesses opening: radially: out.- wardly, a= pair of: annulari facing. plates-- located:-

against the sides of said-legs; aniinner. series of, rivets. rigidly: securing, said: plates to. saidi'legsi andv an outer series.- of rivets :connectingithe saidiplates and holding themagainsti the. side faces ofi'said:

legsi. and aseries of spacing; bushings through which. said. outer rivetspassand. against: which: said .plates: are secured, said-bushings being freely! 'received'inthe:recesses in the-outer ends-of the legs of the spider. v

6. In arotor brake disk' the. combination of a. suppcrting spider. provided with; radially: out-- w-ardly extending. legs the outer ends of: which: areprovided with recesses opening radially out-- W ardly, apairof annular facing. plates located against the sides of: said legs; an: inner seriesot riVets-irigidly securing. said plates-toz-said legs andt anr outer series of: rivets, connecting saidplatesr and holding. them againstthe side faces qof. said legs. a. series ofi spacing; bushings through which.

said. outer rivets passand against" which: said plates are secured, said bushings being freely, received. in. thereces'seswinthe outer. ends-o the legs. of the. spider} and. other outer-[rivets arranged. alternately. with. the rivets: of said. outer. series connecting said side-plates. and. spacing; bushings through. which. said. rivets pass] and againstwhichsaid side platesearesecuredlby saidother'rivets,

w WALTERIJM. LIPPSE. 

